The purpose of this study was to verify the effects of the massage activities on the preschoolers' concentration. By using the quasi-experimental design, this study explored the experimental group and the control group's variations in brain waves of the computerized biofeedback system during pretest, post-test and post post-test. There were 79 young children from two affiliated preschoolers in Taipei City participated in this study. These children were in classes that did not adopt ability grouping and had kids ranging from 4~5 years old. With the approval from their parents, 35 children from two classes in one preschool were allocated to the experimental group, while 44 children from three classes in the other preschool were sent to the control group. The gender, age and social-economic status of these young children were equally distributed among experimental and control groups. The children in the experimental group received an intervention plan aimed at improving their focus by receiving 15 minutes of MISP massage every day in the morning, for five days a week and six consecutive weeks. The children in the control group did not receive any massage. This study collected data on children's ability on paying attention before the intervention, after the intervention and three weeks after the intervention. The data was visualized through NeuroSky EEG technology, showing the brainwave biofeedback when children were focused on reading. The study found that after the intervention of MISP massage, the children in the experimental group had significant and immediate change in the four attention indicators–brainwave frequencies of low alpha, high alpha, low beta and high beta. In addition, three weeks after the experiment, the results remained significant in the experiment group. Three weeks after the MISP intervention, children in the experiment group also all showed improved results in the four indicators compared to those measured before the intervention. Therefore, it is shown that massage in preschools has a significant impact on improving young children's concentration.